What two elements were the first to form?

What will be an ideal response?


Hydrogen and helium.

Environmental & Atmospheric Sciences

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Which of the following areas has the lowest total fertility rate (TFR)?

Environmental & Atmospheric Sciences

Describe the hydrologic cycle and draw a diagram to illustrate the circulation of water in the atmosphere.

What will be an ideal response?

Environmental & Atmospheric Sciences

Clastic sedimentary rocks are classified based on:

a) Color b) Type of bedding c) Mineral composition d) Chemical composition e) Size and shape of sediment grains

Environmental & Atmospheric Sciences

When coal is burned to generate electricity, 70% of the primary energy in the coal is transformed into unused heat. This means that the energy conversion efficiency from chemical to electrical energy is ________

A) 70% B) 30% C) 0% D) 100% E) cannot be determined

Environmental & Atmospheric Sciences